var isIE = document.all?1:0;
var isIE6 = (window.XMLHttpRequest)?0:1;
var usrAgt = navigator.userAgent.toLowerCase();
var isFF = (usrAgt.indexOf('firefox')!=-1)?1:0;
var isOpera = (usrAgt.indexOf('opera')!=-1)?1:0;
var isSafari = ((usrAgt.indexOf('safari')!=-1)&&(usrAgt.indexOf('mac')!=-1))?1:0;
//enables background image cache for internet explorer 6
if (isIE6) try {document.execCommand("BackgroundImageCache", false, true);} catch(e){};
var IE6orIE7 = false /*@cc_on || @_jscript_version < 5.7 @*/;

function f_clientWidth() {
	return f_filterResults (
		window.innerWidth ? window.innerWidth : 0,
		document.documentElement ? document.documentElement.clientWidth : 0,
		document.body ? document.body.clientWidth : 0
	);
}
function f_clientHeight() {
	return f_filterResults (
		window.innerHeight ? window.innerHeight : 0,
		document.documentElement ? document.documentElement.clientHeight : 0,
		document.body ? document.body.clientHeight : 0
	);
}
function f_scrollLeft() {
	return f_filterResults (
		window.pageXOffset ? window.pageXOffset : 0,
		document.documentElement ? document.documentElement.scrollLeft : 0,
		document.body ? document.body.scrollLeft : 0
	);
}
function f_scrollTop() {
	return f_filterResults (
		window.pageYOffset ? window.pageYOffset : 0,
		document.documentElement ? document.documentElement.scrollTop : 0,
		document.body ? document.body.scrollTop : 0
	);
}
function f_filterResults(n_win, n_docel, n_body) {
	var n_result = n_win ? n_win : 0;
	if (n_docel && (!n_result || (n_result > n_docel)))
		n_result = n_docel;
	return n_body && (!n_result || (n_result > n_body)) ? n_body : n_result;
}

function setDlgPos(elid)
{
	
	if(elid=="initWithMe")
		return;
	if(document.getElementById(elid))
	{
		var f_cw = f_clientWidth();
		var f_ch = f_clientHeight();
		var el_H = document.getElementById(elid).style.height.substr(0,3);
		var el_W = document.getElementById(elid).style.width.substr(0,3);
		document.getElementById(elid).style.position = "static";
		document.getElementById(elid).style.top  = eval(Math.abs(f_ch/2) - Math.abs(el_H/2))+"px";
		document.getElementById(elid).style.left = eval(Math.abs(f_cw/2) - Math.abs(el_W/2))+"px";
		var myObj = document.getElementsByClassName('underlay');
		if(myObj != null)
		{
			var myLen = myObj.length;
			for(var i=0;i<myLen;i++)
			{
				myObj[i].removeClassName('underlay');
			}
		}			
	}	
}

function createDialog(elid)
{
	var useShim;
	var ua = navigator.userAgent.toLowerCase();
	if (isIE){
		useShim = true;
		if(!IE6orIE7)
			setDlgPos(elid);
	}else{
		useShim = false;
		setDlgPos(elid);
	}
	if(YAHOO==null)
	{
		alert("Please include yahoo.js");
	}
	else
	{
		dlgBox = new YAHOO.widget.Panel(elid, {modal:true, visible:false, fixedcenter:true, constraintoviewport:true, shim:useShim, draggable:false} );
		dlgBox.render();
		if (!isIE6)
			dlgBox.beforeShowEvent.subscribe(function(){setDlgPos(elid);}, this);
		return dlgBox;
	}
}